<template>
  <div class="add-role">
    <header class="add-header">
      <div class="left">
        <span class="arrow" @click="$router.back()"><i class="el-icon-arrow-left" />返回</span>

        <span>|</span>

        <span>添加角色</span>

      </div>

      <div class="right">
        黑马程序员
      </div>

    </header>
    <main class="add-main">
      <div class="step-container">
        <el-steps direction="vertical" :active="activeStep">
          <el-step title="角色信息" />
          <el-step title="权限信息" />
          <el-step title="检查并完成" />
        </el-steps>
      </div>

      <div v-show="activeStep === 1" class="form-container">
        <div class="title">角色信息</div>

        <div class="form">
          <el-form
            class="form-box"
            ref="roleForm"
            :model="roleForm"
            :rules="roleRules"
          >
            <el-form-item label="角色名称" prop="roleName">
              <el-input v-model="roleForm.roleName" />
            </el-form-item>

            <el-form-item label="角色描述" prop="remark">
              <el-input v-model="roleForm.remark" />
            </el-form-item>
          </el-form>
        </div>
      </div>

      <div v-show="activeStep === 2" class="form-container">
        <div class="title">权限配置</div>

        <div class="form">
          <div class="tree-wrapper">
            <div v-for="item in treeList" :key="item.id" class="tree-item">
              <div class="tree-title">{{ item.title }}</div>
              <el-tree
                :data="item.children"
                :props="{ label: 'title' }"
                show-checkbox
                default-expand-all
                ref="tree"
                node-key="id"
                highlight-current
              />
            </div>
          </div>
        </div>
      </div>

      <div v-show="activeStep === 3" class="form-container">
        <div class="title">检查并完成</div>
        <div class="form">
          <div class="info">
            <div class="form-item">角色名称：{{ roleForm.roleName }}</div>

            <div class="form-item">角色描述：{{ roleForm.remark }}</div>

            <div class="form-item">角色权限：</div>

            <div class="tree-wrapper">
              <div
                v-for="item in disableTreeList"
                :key="item.id"
                class="tree-item"
              >
                <div class="tree-title">{{ item.title }}</div>

                <el-tree
                  ref="disabledTree"
                  :data="item.children"
                  show-checkbox
                  default-expand-all
                  node-key="id"
                 
                  :props="{ label: 'title' }"
                  
                />
              </div>
            </div>
          </div>
        </div>
      </div>
    </main>

    <footer class="add-footer">
      <div class="btn-container">
        <el-button v-if="activeStep > 1" @click="decreseStep">上一步</el-button>

        <el-button v-if="activeStep < 3" type="primary" @click="increseStep"
          >下一步</el-button
        >
        <el-button v-if="activeStep === 3" type="primary" @click="addRole">确认添加</el-button>
      </div>
    </footer>
  </div>
</template>
  
<script>

import { getTreeListApi,addRoleApi } from "@/api/system";
function addDisabled(datas) {
  datas.forEach((item) => {
    item.disabled = true;
    if (item.children) {
      addDisabled(item.children);
    }
  });
}
export default {
  data() {
    return {
      activeStep: 1,
      treeList: [],
      disableTreeList:[],
      roleForm: {
        roleName: "",
        remark: "",
        perms: [],
      },
      roleRules: {
        roleName: [
          { required: true, message: "请输入角色名称", trigger: "blur" },
        ],
        remark: [
          { required: true, message: "请输入角色描述", trigger: "blur" },
        ],
      },
    };
  },
  created() {
    this.getTreeList();
  },
  methods: {
    async addRole(){
        await addRoleApi(this.roleForm)
        this.$message.success('添加成功')
        this.$router.back()
    },
    //确保至少选择了一个权限,才能下一步
    ToFinalStep() {
     this.roleForm.perms = []
      this.$refs.tree.forEach((item) => {
        this.roleForm.perms.push(item.getCheckedKeys());
      });
      if (this.roleForm.perms.flat().length >= 1) {
        this.activeStep++;
      } else {
        this.$message.error("请至少选择一个权限");
      }
    },
    async getTreeList() {
      let res = await getTreeListApi();
      this.treeList = res.data;
      this.disableTreeList = JSON.parse(JSON.stringify(res.data))
      addDisabled(this.disableTreeList)
    },
    decreseStep() {
      if (this.activeStep === 1) return;
      this.activeStep--;
    },
    increseStep() {
      
      if (this.activeStep === 2){
        this.ToFinalStep();
      }
      if (this.activeStep === 3){
        this.$refs.disabledTree.forEach((item,index) => {
          item.setCheckedKeys(this.roleForm.perms[index]);
        });
      }
      if (this.activeStep === 1) {
        this.$refs.roleForm.validate((valid) => {
          if (valid) {
            this.activeStep++;
          }
        });
      }
    },
  },
};
</script>
  
  <style scoped lang="scss">
.add-role {
  background-color: #f4f6f8;
  height: 100vh;

  .add-header {
    display: flex;
    justify-content: space-between;
    padding: 0 20px;
    height: 64px;
    line-height: 64px;
    font-size: 16px;
    font-weight: bold;
    background-color: #fff;

    .left {
      span {
        margin-right: 4px;
      }

      .arrow {
        cursor: pointer;
      }
    }

    .right {
      text-align: right;
    }
  }

  .add-main {
    position: fixed;
    top: 64px;
    bottom: 88px;
    width: 100%;
    overflow-y: auto;
    background: #f4f6f8;
    padding: 20px 230px;
    display: flex;
    .step-container {
      height: 400px;
      width: 200px;
    }
    .form-container {
      flex: 1;
      background-color: #fff;
      overflow-y: auto;
      .title {
        height: 60px;
        line-height: 60px;
        padding-left: 20px;
      }
      .form {
        margin-bottom: 20px;
        padding: 20px 65px 24px;
        .el-form {
          display: flex;
          flex-wrap: wrap;
        }
        .info {
          font-size: 14px;
          color: #666;
          .form-item {
            margin-bottom: 20px;
          }
        }
      }
      .form-box {
        width: 600px;
        display: flex;
        flex-direction: column;
      }
    }
  }

  .add-footer {
    position: fixed;
    bottom: 0;
    width: 100%;
    padding: 24px 50px;
    color: #000000d9;
    font-size: 14px;
    background: #fff;
    text-align: center;
    z-index: 10001;
  }
  .tree-wrapper {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    .tree-item {
      flex: 1;
      padding: 0px 4px;
      text-align: center;
      .tree-title {
        background: #f5f7fa;
        text-align: center;
        padding: 10px 0;
        margin-bottom: 12px;
      }
    }
  }
}
</style>